Manganin diverter and electronic watt-hour meter

Abstract

The invention provides a manganin diverter and an electronic watt-hour meter. In the manganin diverter of the embodiment, a groove penetrating through a manganin sheet is formed in the center of the manganin sheet, and a first connection point connected with the first end of a first sampling line and a second connecting point connected with the first end of a second sampling line are arranged on two sides of the groove respectively. The projections on the first sampling line and the second sampling line on the manganin sheet after twisting divide the groove into a first area and a second area.Two pin plugging channels are formed in a housing of a pin plugging device. The first sampling line and the second sampling line penetrate through the pin plugging channels. The area value of the third area formed between the two pin plugging channels is equal to an absolute value of the difference of the area value of the first area and the area value of the second area. Therefore, process manufacturability is improved and the manual operation difficulty is reduced while the interference of an alternating magnetic field to the manganin diverter is effectively reduced, and thus labor and timeare saved.

Description

Technical field [0001] The invention relates to the technical field of electronic meters, in particular to a manganese-copper shunt and an electronic electric energy meter. Background technique [0002] State Grid’s 2013 new standard "Technical Specifications for Single-Phase Smart Energy Meters" requires no load for 0.5mT power frequency magnetic field: the energy meter is in working condition and the current line has no current. Place it in the 0.5mT power frequency magnetic field interference. The test output should not produce more than one pulse. The scoring item of the sample table sent by the State Grid: the error change amount of 0.02% under the power frequency magnetic field is level 1. [0003] (1) The size of the two areas where the induced current on the manganin copper cancels each other is not the same; figure 1 As shown, a slot is provided in the middle of the manganese copper, two connection points are respectively provided at both ends, and two sampling signal lin...

AI Technical Summary

Problems solved by technology

However, in actual production, due to the wire material and process control capabilities, it is difficult to achieve the same two areas, resulting in the induced electromotive force can not always cancel each other, so the induced current is superimposed on the metering sampling current signal to cause errors Deviation, but cannot meet the requirements of the State Grid for the amount of error change under the power frequency magnetic field

In addition, the two sampling wires are welded on the PCB, so a loop area will also be formed on the PCB, and the induced current formed by this loop area will also cause errors in the sampling signal.

[0004] (2) The workmanship is poor; in order to meet the requirements of the national grid standard, manual adjustment is required figure 1 The size of area 1 and area 2, so as to achieve the area offset on the manganese copper

[0005] Since the very small area deviation may cause the error change to fail to meet the requirements, it is required that the manual work must be fine, which greatly increases the difficulty of manual operation, and it will require a lot of manpower and time costs every time it is sent for inspection.

Images